when i go to the track, i lower my front tire pressure to 23 psi and inflate the rears to 40 psi. i launch at 4,000 rpm by dumping the clutch and seem to run consistent every run....lowering the tire pressure helped a lot with traction when lauching....i have had no problems with the clutch slipping unless i totally screw up the launch. drag racing is an art and a lot goes into it when doing it lol